For the last couple of weeks I've been unable to access my widget settings for my Twitter account. When clicking Widgets on the Settings page, I get this error:

My widgets are still working, but I am unable to access that page to create new or configure existing widgets. (Update: I can access https://twitter.com/settings/widgets/new to create new widgets). Other users I have asked do not have this problem.

I have made several help requests through Twitters official help page but all I get back is automated responses that do not address the issue. These responses prompt me to reply if the issue still isn't fixed, which I do, but there is never a follow-up response.

What I've tried:

Using Chrome and Chromium on two different computers, in both normal and incognito mode.

Fresh install of Firefox, with no extensions, on two different computers.

Chrome browser on my Nexus 7 tablet.

Internet Explorer on a computer that has never accessed Twitter before.